Tonga-Kermadec subduction system

E43916

convergent plate boundary subduction zone tectonic system

The Tonga-Kermadec subduction system is a major convergent plate boundary in the southwest Pacific where the Pacific Plate descends beneath the Indo-Australian Plate, producing one of the world’s deepest ocean trenches and most active seismic and volcanic regions.

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All labels observed (10)

Label	Occurrences
Tonga–Kermadec subduction system	4
Kermadec subduction zone	2
Tonga-Kermadec subduction system canonical	2
Benioff zones	1
Kermadec-Havre-Tonga subduction system	1
Kermadec-Tonga subduction system	1
Kermadec-Tonga subduction zone	1
Kermadec–Tonga subduction system	1
Tonga-Kermadec subduction zone	1
Tonga-Lau back-arc system	1

How this entity was disambiguated

This entity first appeared as the object of triple T346068 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Tonga-Kermadec subduction system
Context triple: [Tonga Trench, associatedWith, Tonga-Kermadec subduction system]

A. Sumatra subduction zone
The Sumatra subduction zone is a major convergent plate boundary off the western coast of Sumatra where intense seismic and volcanic activity occurs, including some of the world’s largest recorded earthquakes and tsunamis.
B. Cascadia Subduction Zone
The Cascadia Subduction Zone is a major convergent plate boundary off the Pacific Northwest coast of North America, capable of generating powerful megathrust earthquakes and tsunamis.
C. Peru–Chile Trench region
The Peru–Chile Trench region is a highly active subduction-zone area off the west coast of South America, known for its deep ocean trench, frequent earthquakes, and major role in Andean mountain building.
D. Japan Trench
The Japan Trench is a deep oceanic trench off northeastern Japan where the Pacific Plate subducts beneath the Okhotsk Plate, forming part of the Pacific Ring of Fire and generating powerful earthquakes and tsunamis.
E. Philippine Sea Plate
The Philippine Sea Plate is an oceanic tectonic plate in the western Pacific whose complex subduction zones and boundaries contribute significantly to the intense seismic and volcanic activity of the region.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Tonga-Kermadec subduction system
Target entity description: The Tonga-Kermadec subduction system is a major convergent plate boundary in the southwest Pacific where the Pacific Plate descends beneath the Indo-Australian Plate, producing one of the world’s deepest ocean trenches and most active seismic and volcanic regions.

A. Sumatra subduction zone
The Sumatra subduction zone is a major convergent plate boundary off the western coast of Sumatra where intense seismic and volcanic activity occurs, including some of the world’s largest recorded earthquakes and tsunamis.
B. Cascadia Subduction Zone
The Cascadia Subduction Zone is a major convergent plate boundary off the Pacific Northwest coast of North America, capable of generating powerful megathrust earthquakes and tsunamis.
C. Peru–Chile Trench region
The Peru–Chile Trench region is a highly active subduction-zone area off the west coast of South America, known for its deep ocean trench, frequent earthquakes, and major role in Andean mountain building.
D. Japan Trench
The Japan Trench is a deep oceanic trench off northeastern Japan where the Pacific Plate subducts beneath the Okhotsk Plate, forming part of the Pacific Ring of Fire and generating powerful earthquakes and tsunamis.
E. Philippine Sea Plate
The Philippine Sea Plate is an oceanic tectonic plate in the western Pacific whose complex subduction zones and boundaries contribute significantly to the intense seismic and volcanic activity of the region.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	convergent plate boundary ⓘ subduction zone ⓘ tectonic system ⓘ
associatedWith	Kermadec Ridge ⓘ linked to: Tonga–Kermadec Arc Tonga Ridge ⓘ Tonga-Kermadec volcanic arc ⓘ linked to: Tonga–Kermadec Arc back-arc Havre Trough ⓘ linked to: Havre Trough back-arc Lau Basin ⓘ fluid release from subducting slab ⓘ mantle wedge melting ⓘ tsunami generation ⓘ
boundedBy	Lau Basin to the west ⓘ Pacific Plate to the east ⓘ
characterizedBy	oceanic-oceanic subduction ⓘ
contains	Horizon Deep ⓘ
extendsFrom	northern Tonga region ⓘ
extendsTo	Kermadec region north of New Zealand ⓘ
hasFeature	active volcanism ⓘ back-arc spreading centers ⓘ deep ocean trench ⓘ frequent large earthquakes ⓘ high plate convergence rate ⓘ high seismicity ⓘ slab rollback ⓘ steep subduction angle ⓘ submarine volcanoes ⓘ volcanic island arc ⓘ
hasMaximumDepth	over 10000 m ⓘ
hasOverridingPlate	Indo-Australian Plate ⓘ
hasPart	Kermadec Trench ⓘ Tonga Trench ⓘ
hasSubductingPlate	Pacific Plate ⓘ
HorizonDeepDepthApprox	about 10800 m ⓘ
locatedIn	southwest Pacific Ocean ⓘ
near	Kermadec Islands ⓘ Tonga Islands ⓘ linked to: Tonga
oneOfWorlds	deepest ocean trenches ⓘ most seismically active regions ⓘ most volcanically active regions ⓘ
overlies	Pacific Plate ⓘ
partOf	Pacific Ring of Fire ⓘ
produces	deep-focus earthquakes ⓘ intermediate-depth earthquakes ⓘ megathrust earthquakes ⓘ
studiedIn	marine geology ⓘ plate tectonics ⓘ seismology ⓘ volcanology ⓘ
underlies	Indo-Australian Plate ⓘ

How these facts were elicited